(ATTN: ADDS details in paras 4-10) SEOUL, Nov. 28 (Yonhap) -- North Korean hacking group Lazarus is suspected to be behind a recent breach of around 45 billion won (US$30.6 million) worth of cryptocurrency from South Korea's largest crypto exchange Upbit, sources said Friday. According to government and business sources, authorities plan to carry out an on-site investigation at the crypto exchange with a belief that Lazarus was behind the hacking. Dunamu, which operates Upbit, said Thursday it c...